What is the difference between using a sample and using a census (population survey)? When is it appropriate to use one or the other?

Answers

Answer 1

Answer:

Answer:

census is a total of the population of a county and/or state.

samples are random selections of people or things

Step-by-step explanation:

If Sky wanted to get a survey from 100 kids who liked baseball or softball in her school. She would not pick the first 100 because it is not random. She would choose choose kids at random till she got her quota.

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A football team gained 35 yards on a first down, lost 15 yards on the second down and gained 12 yards on the third down. How many yards do they need to gain on the fourth down to have a ten yard gain from their starting position?

Answers

13 yards

35-15=20
20+12=32
32-35=3
3+10=13

You are planning to make and sell three different sizes if cylindrical candles. You buy 1 cubic foot of candle wax for $20 to make 8 candles of each size. a.)design the candles. What are the dimensions of each size of candle?

b) You want to make a profit of $100. Decide on a price for each size of candle.

c) Did you set the prices so that they are proportional to the volume of each size of candle? Why or why not?

Answers

a.) Since there are no restrictions as to the dimensions of the candle except that their volumes must equal 1 cubic foot and that each must be a cylinder, we have the freedom to decide the candles' dimensions.

I decided to have the candles equal in volume. So, 1 cubic foot divided by 8 gives us 0.125 cubic foot, 216 in cubic inches.

With each candle having a volume of 216 cubic inches, I assign a radius to each: 0.5 in, 1.0 in, 1.5 in, 2.0 in, 2.5 in, 3.0 in, 3.5 in, and 4.0 in. Then, using the formula of the volume of a cylinder, which is:

V=pi(r^2)(h)

we then solve the corresponding height per candle. Let us let the value of pi be 3.14.

Hence, we will have the following heights (expressed to the nearest hundredths) for each of the radius: for

r=2.5 in: h=11.01 in
r=3.0 in: h= 7.64 in
r=3.5 in: h= 5.62 in
r=4.0 in: h= 4.30 in
r=4.5 in: h= 3.40 in
r=5.0 in: h= 2.75 in
r=5.5 in: h= 2.27 in
r=6.0 in: h= 1.91 in

b. each candle should sell for $15.00 each

($20+$100)/8=$15.00

c. yes, because the candles are priced according to the volume of wax used to make them, which in this case, is just the same for all sizes

Use to model the problem draw the block to show your work

Answers

First of all be more spusific in your question

The length of river a is 560 miles more than twice the length of river B. River A is also 1550 miles longer than river B. Find the lengths of river A and B.

Answers

River B is 990 miles and River A is 2,540 miles.

a = 2b + 560
a = b + 1550
----------------------
a - 2b = 560
a - b = 1550
---------------------
a - 2b = 560
-2(a - b = 1550)
------------------------
a - 2b = 560
-2a +2b = -3100
-a = -2540
a = 2540
-----------------------
2540 = b + 1550
2540 - 1550 = b
990 = b

PLEASE ANSWER ASAP!!!! MUST BE CORRECT FOR POINTS GIVEN!!!!! THE QUESTION IS BELOW IN THE SCREENSHOT!!!!! VERY IMPORTANT!!!!!

Answers

A and D because x is 1/3y not 3y and x times y would be 48 and yes I'm sure

A and D . That was an easy one. Good luck!

Mary has 18 beads, and 6 of them are red. the rest are blue. what fraction of the beads are blue?

Answers

Answer:

1/3

Step-by-step explanation:

I believe you would divide 6 by 13

The answer is 7/13 because if 6 out of 13 of them are red then 7 out of 13 of them are blue.

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